thearkatek
10+ Year Contributor
- 153
- 1
- Jul 29, 2012
-
Saint John,
NB_Canada
Hey all,
Before I get into the issues I'm having I'll post my car info.
92 Talon TSi AWD
Freshly rebuilt 6Bolt 2.3L Stroker (Eagle Hbeam rods, Ross Racing 9:1 Pistons)
Stock head
Garrett T4 Turbo
GM 3" Maf set up as blow through right before the TB
MAFT configured to 440cc injectors and zero'd out
FIC 1050 injectors (flow tested by FIC last fall)
Innovate LC1 wideband
Link V3 Full
I have verified base timing and the only boost leak I have is a tiny one in the compressor seal of the turbo (before the MAF). Did a compression test and all my cylinders were 190 +/- 5 psi. The engine has approximately 50km on it since the rebuild. Oil pressure is strong and mechanically I don't see or hear any signs of a problem
Now the problem I'm having is that my AFR's are all over the place and any time I go into open loop the actual AFR is waaaaaay richer than the AFRestimate. So much that I have to stay out of open loop for fear of washing the cylinder walls.
I've tried to do some cruises and change the maf compensation but something seems way off to me.
When it idle's after it's warmed up it cycles wildly and randomly takes big jaunts either rich or lean. Check out the attached log to see what I mean. I have already ordered a new LC1 sensor to be safe but I'm wondering if anyone has seen something similar to this.
I'm thinking about trying my old stock MAF to rule out the GM MAF and MAFT.
Any suggestions would be really appreciated!!
Thanks,
Nick
Before I get into the issues I'm having I'll post my car info.
92 Talon TSi AWD
Freshly rebuilt 6Bolt 2.3L Stroker (Eagle Hbeam rods, Ross Racing 9:1 Pistons)
Stock head
Garrett T4 Turbo
GM 3" Maf set up as blow through right before the TB
MAFT configured to 440cc injectors and zero'd out
FIC 1050 injectors (flow tested by FIC last fall)
Innovate LC1 wideband
Link V3 Full
I have verified base timing and the only boost leak I have is a tiny one in the compressor seal of the turbo (before the MAF). Did a compression test and all my cylinders were 190 +/- 5 psi. The engine has approximately 50km on it since the rebuild. Oil pressure is strong and mechanically I don't see or hear any signs of a problem
Now the problem I'm having is that my AFR's are all over the place and any time I go into open loop the actual AFR is waaaaaay richer than the AFRestimate. So much that I have to stay out of open loop for fear of washing the cylinder walls.
I've tried to do some cruises and change the maf compensation but something seems way off to me.
When it idle's after it's warmed up it cycles wildly and randomly takes big jaunts either rich or lean. Check out the attached log to see what I mean. I have already ordered a new LC1 sensor to be safe but I'm wondering if anyone has seen something similar to this.
I'm thinking about trying my old stock MAF to rule out the GM MAF and MAFT.
Any suggestions would be really appreciated!!
Thanks,
Nick